:root{--color-primary: #1B2D5B;--color-primary-light: #2E4A7A;--color-primary-dark: #11203F;--color-accent: #8C939A;--color-accent-light: #A8AEB6;--color-accent-bright: #C8CDD4;--color-bg: #ffffff;--color-bg-alt: #F2F4F7;--color-text: #1a1a2e;--color-text-muted: #7B7F85;--color-border: #DFE3EA;--color-success: #16a34a;--color-error: #dc2626;--font-sans: "Segoe UI", system-ui, -apple-system, sans-serif;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: 1rem;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .12);--shadow-md: 0 4px 12px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .18);--max-width: 1200px;--spacing-section: 5rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-sans);font-size:var(--font-size-base);color:var(--color-text);background-color:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--color-text)}h1{font-size:var(--font-size-4xl)}h2{font-size:var(--font-size-3xl)}h3{font-size:var(--font-size-2xl)}h4{font-size:var(--font-size-xl)}h5{font-size:var(--font-size-lg)}h6{font-size:var(--font-size-base)}p{line-height:1.7;color:var(--color-text)}a{color:var(--color-primary);text-decoration:none;transition:color .2s ease}a:hover{color:var(--color-primary-light);text-decoration:underline}img{max-width:100%;height:auto;display:block}.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.section{padding:var(--spacing-section) 0}.section--alt{background-color:var(--color-bg-alt)}button{font-family:var(--font-sans);cursor:pointer;border:none;outline:none}button:focus-visible{outline:2px solid var(--color-primary-light);outline-offset:2px}input,textarea,select{font-family:var(--font-sans);font-size:var(--font-size-base)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.text-muted{color:var(--color-text-muted)}.text-accent{color:var(--color-accent)}.conference-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width: 768px){.conference-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1024px){.conference-grid{grid-template-columns:repeat(3,1fr)}}#root,.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-main{flex:1}